In a number of automotive manufacturing processes, rotary tables are used to index parts into various automatic and manual work stations. In many cases, it is necessary to use sensors to verify that parts are present, properly placed, or correctly processed before indexing.
Historically, the solution of using slip rings to allow sensor power and signals to be hardwired to the control system has often proven to be costly and unreliable. An alternative solution that allows more sensor signals to be processed while increasing the reliability is needed.